CompTIA Network+ N10-009 Exam Questions in PDF

Free CompTIA N10-009 Dumps Questions (page: 12)

A small business is deploying new phones, and some of the phones have full HD videoconferencing features. The Chief Information Officer is concerned that the network might not be able to handle the traffic if the traffic reaches a certain threshold.
Which of the following can the network engineer configure to help ease these concerns?

  1. A VLAN with 100Mbps speed limits
  2. An IP helper to direct VoIP traffic
  3. A smaller subnet mask
  4. Full duplex on all user ports

Answer(s): A



A virtual machine has the following configuration:

IPv4 address: 169.254.10.10
Subnet mask: 255.255.0.0

The virtual machine can reach collocated systems but cannot reach external addresses on the internet.
Which of the following is most likely the root cause?

  1. The subnet mask is incorrect.
  2. The DHCP server is offline.
  3. The IP address is an RFC1918 private address.
  4. The DNS server is unreachable.

Answer(s): B



Which of the following is used to estimate the average life span of a device?

  1. RPO
  2. RTO
  3. MTTR
  4. MTBF

Answer(s): D



Which of the following is the most secure way to provide site-to-site connectivity?

  1. VXLAN
  2. IKE
  3. GRE
  4. IPSec

Answer(s): D



A network technician is terminating a cable to a fiber patch panel in the MDF. Which of the following connector types is most likely in use?

  1. F-type
  2. RJ11
  3. BNC
  4. SC

Answer(s): D



A network administrator is connecting two Layer 2 switches in a network. These switches must transfer data in multiple networks.
Which of the following would fulfill this requirement?

  1. Jumbo frames
  2. 802.1Q tagging
  3. Native VLAN
  4. Link aggregation

Answer(s): B



A network administrator wants users to be able to authenticate to the corporate network using a port-based authentication framework when accessing both wired and wireless devices.
Which of the following is the best security feature to accomplish this task?

  1. 802.1X
  2. Access control list
  3. Port security
  4. MAC filtering

Answer(s): A



Which of the following is most closely associated with a dedicated link to a cloud environment and may not include encryption?

  1. Direct Connect
  2. Internet gateway
  3. Captive portal
  4. VPN

Answer(s): A



Share your comments for CompTIA N10-009 exam with other users:

O
onibokun10
4/13/2026 7:50:14 PM

Question 129:
Correct answer: CNAME

  • A CNAME record creates an alias for a domain, so newapplication.comptia.org will resolve to whatever IP address www.comptia.org resolves to. This ensures both names point to the same resource without duplicating the IP.
  • Why not the others:
- SOA defines authoritative information for a zone. - MX specifies mail exchange servers. - NS designates name servers for a zone.
  • Notes: The alias name (newapplication.comptia.org) should not have other records if you use a CNAME for it, and CNAMEs aren’t used for the zone apex (root) domain. This scenario uses a subdomain, so a CNAME is appropriate.

J
Joe
1/20/2026 8:25:24 AM

Passed this exam 2 days ago. These questions are in the exam. You are safe to use them.

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